Lifting-jack.



H. E. MAUREH, lm

LIFTINGJACK. APPLICATION FILED IIIII. 2l. 19:8.v

2 SHEETS-SHEET I.

111111111111611. I APPLIEATION FILED JAN. 21.1918- Lml. 1119111611 Aug.13, 1918;

2 SHEETS-SHEET 2.

www.

NH-1115 STATES PAT OE. IC.

if a HENRY E. Mairena; JRT; "or" srniiferiniin, trimmers, Assreitoa or"onEHALF To y i i HARRY Linn,"orxspniiverrnnn,iLLINQIS.

- Tooll mitom- `t concern:

`1`Beit knownthat I, `HENRY E. Mannini, ,Irsa citizen of thenitedStatearesiding at Springelm in thecoiinty of `Sangamon and `Stateyof `Illinois,` have-invented a certain new and useful Improvement `inLifting Jacks, of Which lthe following is a full, clear, concise, andexactA description; g .1

y invention relates to lifting jacks and liasfor onecfits objectstlieprovisionof` a jack which `may readily be positionedyvith respect tothe, load supported thereby` Withoutshiftingthe load;` y 1 .Theinventionlhas for` another of its ob- ,jects the employment, ina jack,of tvvo load y supporting members in combination With lload improvedmechanism for effecting movement of at least one of theload supportingmembers toward the other toflift the load, reverse operation .of` thjSmechanism serv-` ing to lovverthe load.` i i uf In `the preferredembodiment `ofmy invention aside piece connects one end of Ionesupporting" member With` `one "end of the.. other loadsupportingymember; the. re-

maining ends of said` load supportingmem- .sity of tion. a rack bar isbers` being `discionnectecl to afford a gap therebetween in whichtheload tobesup the i. movable load. supporting member;` a i and extendslongitudinally of"` the` d side `;p iece, there being a bar;` `engagingmember `or i p'ayvl ensageablewth the? teeth afable@ rechi bal @11doperable by` the: levers mechanism@ I bar a ilorlstudnally' the framepiece to direct movementlef the "movable load supporting memberlongitudinally of the side piece. norderijtliat the"` load ,supp rting`members." may `be reaffl'ily `adapted t0. themed" Without the `IleSSWOff york "Linterna-JACK;

specification of Letters Patent.

` small truck and 5 when the will. explain byireferenee to theaccompanying drawings showingthe preferred embodiment thereof View es"lines-tst; fFis ftloilal WGW. vis a Patented nag.` iafieisl Applicationfiled January 21, isis." seai iro. 212,940. y

ing'the lever mechanism there is provided `a if pawl .dseneasns device aadjusted to functioiiby said levermeclianism" when inidle position to`normally y disengage d the pawl from `the rack bar andtherebydissociatethe racl bar from the that the movablef load S supportingmember may be inovedindependently of the lever mechanism;

y a The jacks of my invention are of paijtcu#` supporting .automobilesor la lOne `Jael; isemployed for` lar service i in Wheels thereof.` deach wheeltliat ishto be supported andvvhen the entire `automobile is`to be. supported there are four `jacks in use, one for each of levermechanism `in` order i 1 the Wheels. y Eachjack isdesirablysupportf .i

ed upony casters that. constitute.suchjaelra four `Wheelsof theautomobile are l supportedtin elevated positions upon these smalltracks,` the automobile may readily be rolled around'` in limf. d

`ited sp ace. l Ther jacks y of `my invention are,

consequently, of `particular service .when

iised.` in garages as anl automobile supported therebymayreadily be`moved `M Ollfld 1 in `the .limitedrspaces in vvhicli automobiles `areusually disposed when located garages.`

my invention 1. more fully and ingivhichlfgigure l` isa planview lofa` ilifting ack d constructed in accordance with the preferred y embodimentof@ the invention,

thisiigureslioving the movable load sup# .porting `member moved to aload. engaging` position n independently ofthelever; d isla` View inelevation of the `structure asit appears in Fig. l, the dot anddash`lines in Figs l` and ZIrepreSenting a` portionfof `an`automobile.vehicle` `Wheel -engaged"` by: the

Fig. 2

`tlie elevation y. of the :Wheel 3 isla ldetail .tewiiofsiartfifth@Strutture as miniem-1S inMFignZbut on awlargerfscale and-taken fromfthei.other side;.l`ig, sectional y than employed in i 2,` shovvingfthe ackautomobile; and Vlfig. 7 is a view iineleyaa y ping 'bar 5 may be 'Y yprojecting 'l the form of "nectsone end of one load supporting membering the side piece i side piece tion illustrating the initial adjustmentof a jack in which adjustment it may readily be slipped into positionbeneath al vehicle wheel.

rLike parts are indicated by similar characters of reference throughoutthe different figures. 'i

One of the two load supporting members in the jack of my inventionincludes an en d piece 1 rigidly secured to and projecting laterallyfrom the side piece 2. The portion ofthis load supporting member that isdirectly. engageable ably in the form of a roller 3 mounted to rotate inthe end piece 1'to have an axis of rotation that is'at right angles tothe side piece 2. kA pulling chain V4 having a `gripattached to the endpiece 1 whereby VthefjackV maybe pulled about. The other load supportingmember includes an end piece 6' slidably mounted upon and laterally fromthe side piece 2, the end piece 6 having a sleeve 7 surround- 2 andhaving sliding engagement therewith.r The portion of this Y loadsupporting member that is directly engageable with the load is alsodesirably in j a roller 8 mounted to rotatein the end piece 6 to have anaxis of rotation that' is at rightangles to the side piece 2. The endpieces 1 and 6 are supported upon casters 9 that permit the jack'to bereadily moved about'either when supporting a load or wheny beingadjusted to loadsupporting position. Y

When the load supporting members are made up in part of the rollers 3and 8 for thev purpose of engaging automobile vehicle wheels theserollers are desirably made concave asfillustrated.'` The side piece 2conwith one end of the other load supporting member, theremaining endsof these load supporting members being disconnected to afford a vgaptherebetween in which the load to besupported, such .as an automobilevewheel 10,' may be initially received (Figi 7) VAand permittingmovement-'of the toward the automobile vehicle wheel or other load untilthe rollers 3y and 8 are in the plane of suchv wheel or load. After therollers are brought into the plane of the-vehicle'wheel they are both'engaged Vwith the vehicle wheel by pushing theportion of the `load'supportingfmember that is movable upon the side piece A2 toward thevother :load supporting memberythe. casters xreadily permitting bothrollers j Y 3 andS to Vb'e broughtrinto snug engagement with the load.

,'{Arfter the @rollers Y have been "thus adjusted *mechanism,'presentlyv to be described, 4is `b'rought into playy to efect furtherapproach of' the rollers'jthat willV effect the elevation of theautomobile wheell() as'illustrated in Fig.'6. f l' with v the load' Visdesir- A rack bar 11 has pivotal connection at 12 with the movable loadsupporting member and extends longitudinally of the side piece 2. A handlever 13 has its fulcrum 14 provided upon the bracket 15 that projectsvertically from the split sleeve 16 which is clamped to the bar or sidepiece 2 by means of the clamping bolt 17. This lever 13 carries `a barengaging member in the form of la pawl 18 through the intermediation ofa pawl carrier 19 that is pivotally mounted upon the lever 13 asindicated clearly in Fig. 4 where I have shown a wrist extension 20 ofthe pawl carrier passing through the lever 13 and held in assemblytherewith by the nut21 that is threaded upon the bolt extension 22 ofthe wrist 20. A spring 23, when free to act, serves to depress the pawl18 into engagement with the teeth of the rack 11. YIt will beobservedthat the wrist 20 and the fulcrum 14 are spaced apart a'distance similar to the distance between the fulcrum 14 and an uprightpost 24 which is also carried by the split sleeve 16. hen the lever isin its idle position a pin 25, carried by the pawl 18, engages the topof the post 24, this post being long enough to elevate the pawl 18 outof engagement with the rack 11 and against the force of the spring 23.Because the pawl disengaging device is thus adjusted to function whenthe lever is in its idle posi- 'tion the rack bar 11 has nothing toimpede its, movement longitudinally of the bar or side piece 2 on whichaccount the movable load supporting member may be moved along the sidepiece 2 independently of the lever in order that the load engagingrollers 3 and 8 may be readily applied to the load before the load iselevated.y Such an adjustment of the rollers is illustrated in Figs. 1and 2, the vehicle wheel 10 still remaining upon the floor. By turningthe lever 13 clockwise the pawl carrier 19 Vis first elevatedsuiiciently to remove the pin 25 -from engagement with the post 24 topermit the spring 23 to engage the pawl 18 with the rack 11, furthermovement of the lever forcing the load supporting rollers toward eachother to lift the load.v 'v

As illustrated in Fig. 4, the rack is, vin cross section, in the shapeof an inverted T whose head andV stem are in snug sliding engagementwith the pawl carrier 19 whereby ,movement of the rack vertically withrespect to the pawl carrier is prevented.` Because of this engagement ofthe rack bar with the pawl carrier the pawl will force movement 4of therack longitudinally of the sidefpiece 2 as'the' lever is being turnedclockwiseand as the rack is pivotally connected with the wmovable loadsupporting member at 12 such member will be moved toward its companionmember to elevate the load v10. When the load Vis to be lowered thelever is turned in a counter-clockwise direction to permit the i rackteeth to escape the pawl` and when' the lever has been fully restored toits idle position the movable load supportingmember may readily `be iseparated sufficiently from the other load `supporting "member `toenable the jack to. be withdrawn laterally "from the load.

When four ofthese jacks are insupporting relation to the fourvehicle'wheels of an automobile or other vehicle such vehicle mayreadily be shifted about from place to place where space `for movementis limited.` Where the jacks are constructed to have a plurality thereofused to elevate an automobile or a part of the automobile the side piece2is preferably made cylindrical and one or both of the load supportingelements are adapted to turn on said side piece so that the loadsupported by any one or more jacks is equally ldistributed on the loadsupporting elements. Any unevenness in the floor that an automobile maybe pushed over is thus compensated for since the casters are free toseek the varying surfaces of the floor, these casters being mountedupon. the load supi a porting elements rather than directly upon thesidepiece 2. ln other words,` by this preferred construction of the jack,any twisting or side strains are taken olf the side pieces 2 as thecasters encounter unevenness in the licor and all casters at all timesretain their proper share of the load. Igprefer to employ load engagingrollers when the loads to be supported are in the nature of vehicle orautomobile wheels as these vehicle wheels may readily be turned orrotated by hand to adjust the brake bands which engage the brake drumson the wheels whilethe weight of the automobile is carried upon thejacks.

l do not limit myself, however, to the employment of rollers forengaging the load that is to be supported'.

lhile l have hereinshown and particu laily described the preferredembodiment of my invention l do not wish to be limited to the precisedetails of constructionshown as changes may readily be made withoutdeparting from the spirit of my invention, but

having thus described my invention I claim as new and desire to secureby Letters Patent the following 1. A lifting jack includingl two loadsupporting members; a side piece connecting said load supporting membersand along which one of the load supporting members is movable toward andfrom the other load supporting member; a rack bar connected with saidmovable load supporting member" and extending longitudinally of the`side piece; a lever having a fulcrum supported by the side piece; and apawlengageable with the teeth of the rack bar and operable by said leverto draw the rack bar longi@` tudinally of the side piece and thereby efufect"inoveinei`itof said "movable loadl supporting member longitudinallyof the side piece. i t

\ y i! lifting jack including two load supporting meinbersy a side`piece connecting a said load "supporting members and along which one ofthe load supporting members movabletoward andfromthe other load@supporting member; a rack bar pivotally `connected with said movableload supporting member and extending longitudinally of the side piece; alever having a fulcrum supported by the side piece; and a pawlengageable with the teeth of the rack bai' and operable by said lever todraw the rack bar longitudinally of the side piece and thereby effectmovement of said movable load supy porting member longitudinally of theside `teeth of the rack bar and operable by said lever `to draw the rackbar longitudinally of the side piece and thereby effect movement of saidmovable load supporting member longitudinally of the side piece; and apawl discngaging device adjusted to function by said lever when in idleposition to normally disen- `gage the pawl from the rack bar to permitsaid movable load supporting member to be moved longitudinally of saidside piece independently of the lever.

(L A lifting jack including two load supporting members; a side piececonnecting said load supporting members and along a which one ofthe loadsupporting members is movable toward' and from the other load`su}`iporting member; a rack bar pivotally connected with said movableload supporting member and extending longitudinally of the side piece; alever having a fulcruni` supc ported by the side piece; a pawlengageable with the teeth of the rack bar and operable by said lever todraw the rack bar longitudinallyof the side piece and thereby effectmovement of said n'iovable load supporting member longitudinally of theside piece; and

a paw] disengagingdevice adjustedto function by said lever when in idleposition to normally disengage the pawl from the rack bar to permit saidmovable load supporting inemberto be moved longitudinally of said sidepiece independently of the lever.

5:. A lifting jack including two load supporting membersgwa side piececonnecting said load supporting members and along Whehone of Jche loadsupporting members is movable tow-ard and from the other load Supportingmember; a bar connected With said movable load supporting members, a 5lever having a'fulorum supported by the side piece; and a barengagngmember operable by said lever to drawsad bar longitudinally my name thissixteenth day of January, y

an. 191e.

HENRY E. MAURER, JR.

copies of this` patent may be obtained for ve cents each, by addressingthe Commissioner of Patenti,

` Washington, D. 0.

